Control of power amplifiers in devices using transmit beamforming
US7565117B2 · kind B2 · utility
6Cited by
109References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2006 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | May 10, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2601
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmitter comprises a plurality of transmit antennas for simultaneously transmitting weighted signals according to a channel transfer function. Each antenna has a corresponding amplifier that is bias controlled according to the transmit weights derived for the antenna transmission. A baseband processor produces digital weighted signals for upconversion and amplification by the amplifiers. Each amplifier is accompanied by a bias circuit responsive to the transmit weights. Alternatively, or additionally, corresponding DC/DC converters are used to control the operating voltage of the amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.